Oil feeding device for oil burners



Sept. 4, 1951 E. F. CHANDLER OIL FEEDING DEVICE FOR OIL BURNERS Filed Feb. 27,

Patented Sept. 4, 1951 UNITED S TATES PATENT OF Fl CE 01L FEEDING nnvroE FOR OIL BURNERS Edward F. Chandler, Brooklyn, N. Ya Application February 27, 1947, Serial-No. 731,220

3 Claims. 1

This invention relates to'heating devices in the nature of oil burner systems and the components thereof.

An object of the invention is to provide an improved means for conducting oil safely and in metered quantities and flow rate from an oil storage reservoir to the oil burner housing, said means including oil conduits with an oil sump housing interposed therein, and means for scoop-= ing oil from the oil in the sump housing and allowing it to enter a conduit for being fed into the oil burner housing.

Another object of the invention is to provide an oil burner system the components of which are simple in design, relatively inexpensive to manufacture, and easily assembled to function as a high efficiency heating device.

Other objects and advantages of the invention will become apparent from the following description of a preferred embodiment thereof as illustrated in the accompanying drawings, and in which,

Figure 1 is a sectional elevation of the oil burner head and the oil feeding means connected thereto,

Figure 2 is a left end elevation of the device shown in Figure 1,

Figure 3 is a sectional elevation taken on line 8-8 of Figure 1,

Figure 4 is an elevational view 'of an oil reservoir tank employed in the device, and a schematic diagram showing the electrical connections for controlling the operation of the oil burner system,

Figure 5 is an end elevation of an oil cup with a modified form of oil conduit connected thereto, and

Figure 6 is a sectional longitudinal elevational view taken on'plane 8-6 of Figure5.

In order to understand clearly the nature of the invention and the best means for carrying it out, reference may now be had to the drawings, in which like numerals denote similar parts throughout the several views. As shown, there is a burner head housing -i6 including a disclike right end wall l2 cast integral with an annuular flange [4 to define a burner recess l6 which is open along its left edge 3.

A circular opening is formed in the center of the right end wall I! to allow entry of air into the recess I6 therethrough as indicated by the arrow 22. A tube 24 is journaled in anti-friction bearings 26 and 28, the bearing 26 being supported upon a bracket 3|! extending upwards out of the housing l6, being cast integral therewith or suit ably secured thereto.

The left end portion of the hollow tube 24 extends through the opening 20 into the recess I6,

and has concentrically mounted thereon a cup {32 the base 34 of which has an axial bore 36 formed therein for the reception of the end of the tube 24, the cup and tube being secured together in any suitable manner so as to be rotatable together. The cup 32 has side walls with cylindrical outer surfaces 38, the inner wall surface '40 thereof being convergently tapered from left to right as seen in Figure 1.

The tube or shaft 24 also has a longitudinalbore '42 which is convergently tapered from left 'to right as seen in Figure 1, so that as the tube is rotated rapidly about its axis, any oil which may enter the right hand end of the tube as will be hereinafter described, will be caused to flow "from right to left in the direction of the arrow 44 under the influence of centrifugal force, en= t'ering the recess 46 in the rotary atomizing cup '32. Since the cup 32 is also rotating rapidly with the shaft 24., this oil is similarly caused to flow from right to left along the tapered inner walls 40 to the edge 46 of the cup, from which it is thrown oil as a disc of fine spray or mist.

Positioned in the front of the housing [0, is a battle member 48, which is a disk Preferably made of refractory material the outside diameter of which is less than the inside diameter of the cylindrical portion 14 of the housing I0, so as to form an annular passageway 50 therebetween for the passage of air in the direction of the arrows 52. The air current is derived from a rotary fan 54 having blades 56, the hub of which is mounted on the hub of the cup 32 by means of screws 58, the fan being rotatable with the shaft '24 and the cup. Means such as a pulley 51 may be belted to a motor for rotating the shaft 24.

The baffle disk 48, which is supported by bracket clamps 59, has an axial aperture 66 through which the cup 32 extends, the cup in completely filling the aperture so as to form an annular air passageway 62 therebetween for the passage of air from the fan 54 in the direction such as indicated by the arrow 64. Electrodes '66 which are curved as shown in Figure 2, and are spaced from the outer surface of the cup 32, have their lead wires extending through apertures or slots 68 formed in the baflle disk 48, and are led through insulators 16 which are seated in sockets 12 in the form of apertures in the housing wall I4.

The electrode lead wires may be connected by means of wires 14 to the high tension winding of a transformer 16 or other suitable spark pro-- ducing device, the primary winding of which is connected by means of wires 18 to power supply lines 80, as shown in Figure '4.

The air issuing through space 62 mixes with the oil spray from cup 32 to form a combustible admixture, and when suitable electrical energy is delivered to the electrodes 68, a strong spark is formed therebetween, which, due to the flow of air through the space 62, is blown into contact with the said air-oil admixture, igniting the same. Suitable time switch means may be used to disconnect the ignition when the flame is established.

The swirling disc of flame thus formed meets and is augmented by the oxygen of the air flowing through the opening 50. This latter air tends to turn the edge of the flame disc forward (or upward in a vertical type burner), forming an envelope moving at right angles to the original flame direction, thereby causing intimate and complete mixture. v

The tubularshaft 24 may also be made with a cylindrical non-tapering bore 32, as best shown in Figure 5, in which case a spiral groove 84 may be cut in the inner surface of the bore to aid the oil to flow leftwards toward the cup 32. Or, instead of using a spiral groove, a spiral wire coil may be inserted within the bore for the purpose, the wire coils being arrangedand located approximately like the spiral groove. However, the pumping means hereinafter described may be sufiicient in general, in which case such assistance as the wire coils will not be necessary.

As seen in Figure 1, the right hand portion of the tube 24 is equipped with a bearing 28, carried by a part of the burner frame 86, shaped to form an oil sump or pocket 88. On the right hand end of the shaft 24, is attached a cup like member 98 having an annular inturned flange 92 and defining an inner channel 9 1. Oil 96 is maintained normally within the sump at a level below the entrance to the channel 94.

When, during the operation of the burner, this level is raised sufliciently so that the member 90 dips into the oil a depth sufficient to permit oil to enter said channel past the flange 92, it will be seen that by centrifugal force, oil will be picked up and carried around by the rotating channel. In order to cause the oil to be fed to the cup 32 through the hollow shaft 24, a substantially U-shaped member 98, positioned as indicated in Figures 1 and 3, scoops oil from said channel, as the oil passes over the shorter leg I!!!) of the member 93, causing the oil to flow down the groove I02 between the longer and the shorter legs HM and I80 of the member 98, in the direction of the arrow I I94, the oil then entering the right hand end of the bore 42 in the shaft 24.

A constant level valve device of well known construction and commonly employed in the art on gravity feed oil burner systems is indicated at I06 in Figure 4. Oil from a storage tank (not shown) flows by gravity to device I06 through pipe I08, the said oil being held therein normally at a level indicated at llii. Oil from device I06 leaves through pipe I I2, flowing therethrough to the sump 88, where a similar level is maintained.

A metering valve, which is a part of the standard unit [[36, is adjusted by means of adjustment member I Hi to permit the oil to flow through pipe H2 to the burner at a constant rate of feed. This feed is started, upon operating theburner, by electromagnetic means within the unit 106, when said means is energized, as by the passage of electric current through the leads H6 which are connected to the power lines 80.

A motor for operating the burner as by rotating the shaft 24, is shown at H8. A switch, thermostat or other means I20 may be interposed in the electrical circuit for starting the burner operation. Closing the circuit by device I20, it will be seen, energizes the constant level valve device H36, permitting oil to flow at a metered rate to the burner, the motor H8 being actuated at the same time. Also the spark-forming ignition actuating means 16 is energized through wires 18 to cause the oil-air mixture to be ignited in the burner. A time delay switch may be interposed in the wires 18 to out ofi the ignition spark after a suitable interval when the flame has been established in the burner.

Although I have described a preferred embodiment of my invention in specific terms, it is to be understood that various changes may be made in size, shape, materials and arrangement, without departing from the spirit and scope of the invention as claimed.

I claim:

1. An oil pump comprising a housing having a sump chamber formed therein for the reception of oil to a first level incompletely filling the same, an oil duct having one end in communication with the said chamber above the said first'oil level, said oil duct being adapted for conducting oil from said housing, a cup mounted in said chamber for rotation about a horizontal axis and having its side wall dipping into said oil in the sump, whereby upon rotation of the cup and under the influence of centrifugal force, oil en-' tering the cup is whirled with the said cupwall about a horizontal axis, at least a portion of the circular path of said whirled oil lying above the mouth of said oil duct, baifie means extending into the path of said whirling oil for scooping oil from its path and for conducting it into the mouth of said oil duct, whereby it is free to be conducted therethrough.

2. An oil pump comprising a housing having a sump chamber formed therein for the reception of oil to a first level incompletely filling the same, an oil duct having one end in communication with the said chamber and at a second level above said first level, said'oil duct being adapted for conducting oil from said housing, a cup in said chamber disposed for rotation about a hori zontal axis and having its side wall dipping into said oil in the sump, an annular inturned flange on said cup side wall for normally blocking entry of said oil into said cup, means for rotating said oil duct and oil cup about a common axis, whereby, upon the raising of the first level of oil in. said sump above said annular flange. said oil is free to enter the oil cup, being whirled thereby in a vertical circle under the influence of centrifugal force. at least a portion of the said vertical path of the oil lying at a level higher than said second level, an oil intercepting member having a wall extending into the ath of said whirled oil and adapted to scoop oil therefrom, said oil intercepting member havin an oil conduit for conducting said scooped oil into the said mouth of said oil duct, whereby it is free to be conducted therethrough.

3. The construction according to claim 2, characterized further in that said oil duct has a tapered bore formed therein the diameter of which bore increases with distance from said 'o'il sump chamber.

' EDWARD F. CHANDLER.

(References on following page) REFERENCES CITED UNITED STATES PATENTS Number Name Date 1,733,287 Truesdell Oct. 29, 1929 1,855,339 Cornelius Apr. 26, 1932 1,931,083 Rodler Oct. 17, 1933 Number Number Name Date Thomas Sept. 10, 1940 Sampsel May 25, 1943 Litzenberg Mar. 4, 1947 FOREIGN PATENTS Country Date Switzerland Nov. 16, 192-5 

